Supporting-chair for drill-boxings



J. H. WENZLICK. .SUPPORTING CHAIR FOR DRILL BOXINCS.

APPUCA TION FILED MAY'ZL ISZO Patented May 10, 1921.

[fix/27m? ATTORNEY parallel upright relatively-spaced side-bars UNITED STATES PATENT orrlcsg aoHN'II. WENZLICK, on WHEELING, WEST VIRGiNIA.

SUPJiORTING-CHAIR FOR DRILL-BOXINGS.

Specification of Lettrs Patent. P t t d 3 10, igg

Application filed May 21, 1920. Serial No. 383,312.

and more particularly to a chair structure for the support of the bearings or boxings in which such drills or augers are carried.

The primary object of the invention is to provide asupporting chair of the adjustable sliding type which'has the opposite body members thereof disposed in flexible conneoted relation so that they will automatically adjust themselves to variations in the distance between the upright side-bars. or supporting posts by which they are carried. A further object is to provide a chair of the character mentioned havingseparable body members having connecting means which allows said members suflicient relative play or movement to adopt themselves to any irregularities in the side-bars, thus insuring a free and easy, or non-binding, movement during adjustment of the chair.

In describing the invention in detail, reference is herein had to the accompanying drawings, in which Figure 1 is a front elevation of the invention;

Fig. 2 is a central vertical section of the same; and- Fig. 3'is a side elevation.

Referring to said drawings, 1 and 2 indicate two oppositely disposed body members adapted to be slidably mounted upon the which constitute the usual supporting posts for the drill. Said members have their outer faces formed with vertically disposed ribs 3 designed to seat within the longitudi nal channels commonly provided in the inner "or confronting faces of the sidebars and have cages 4 and 5 formed at their upper and lower ends, respectively, in which said side-bars are received. The cages 5 carry projecting boss-like portions 6 which are interiorly threaded for the reception of set-screws whereby the chair is secured in adjusted position upon the side-bars.

As chairs of this general type have heretofore been constructed, the two body members and the connecting rod or bar have been cast in an integral one-piece structure. Such integral. construction is objectionable for the reason that the body members are infiexibly related and, consequently, when irregularities in the side-bars or variations in' the distance between the side-bars are encountered, the chair naturally binds upon the side-barsto the extent that adjustment is rendered difiicult. The objection noted is obviated in the present device by the provision of means whereby the opposite body members 1 and 2 are relatively secured together in spacedvrelation and, at the same time,a're capable of alimited range of free and independent movement which allows Y said parts to accommodate themselves to suchslight irregularitiesin form and variations in the spacing-of theside-bars as-is commonly encountered 1n ad usting chairs on such side-bars. Said securing means comprises a horizontaliarml or tie-rod 7' rigidly carriedby or formed integral with one of the body members, as 1, at a point approximately midway between the ends of the latter. Said rod has the outer end thereof reduced to form a neck portion 8 and is terminated by a head 9 of oblong form. Said reduced neck is designed to fit loosely within an oblong hole 10 provided in the body member 2. The hole 10 has its greatest diameter extending substantially at right angles to the greatest diameter of the head 9 when the said body members occupy their normal relative positions, so that said members will be securely connected against chance separation. The said head 9 and holelO substantially correspond in size and form so that the formerrmay be readily introduced through the latter when one of said members is disposed in a position; approximately at right angles, to the other, as indi cated in dotted lines in Fig. 3.

Due to the loose fit of the neck 8 of the tie-rod 7 in the hole 10 of the member 2, each of the members 1 and 2 is obviously more or less free to move with respect to the other for the purpose hereinbefore referred to.

Provided in the inner faces of the opposite cages 4 of each of the body members is a recess or seat 11, the opposite seats constituting bearings for the trunnions of the boxings in which the drill shank is carried. Similar seats or bearings 12 are provided in the inner faces of the cages 5, said bear- 'ings being designed for use when the-chair occupies a reversed position.

jns'tm'ent upon the bars of a-supporting post means whereby said membersare held in spaced relation and are allowed a l mited means comprising a transverse connecting element havmgxed relation at one end Formed on the front faces of cages 4 are projecting portions. 13having. bearings 14: therein adapted for the reception of boxing trunnions of alength greater than those I for which the bearings ll and 1 2' are desi ned.

WV'hat is claimed l. A supporting chair for miners drills, comprising body members adapted for adrange 'of independent free movement; said Withone of said members and having its joint with the other member.

opposite endheaded and forminga flexible 2A supportingchairfor miners drills, comprising body members adapted for adjustment uponthe barsof a supporting post, and means whereby said members are detachably connected, said means comprismg a tie-rod' rigidly carried by one or said; membersand arranged to torm a flexible .1 joint with the other member. 5' c 3.1A supporting chair "for miners drills, 130

comprising body members adaptedvfor adj ustmentupon the'bars of a supporting post,

the latter.

and means whereby said members are de- [tachably connected, said means comprising a tie-rod rigidly carried by one of said members,said rodhaving an oblonghead upon its end and projected'through an oblonghole in the opposite member, said head and said hole being normally disposed in such relationthat the greatest diameter of the former crosses the greatest diameter of 'Inte'stimony whereof, I aflix my signa-V ture" in presence of two subscribing wltnesses;

V j JOHN WENZLICK.

Witnesses l J ULIA W. GoooH, GEO.- E. SHIEROFF.

chair for miners drills, 

